A very useful additional tool,
This saw was purchased to use during the conversion of my roof to a warm roof design. This meant cutting a large number of Kingspan / Celotex type boards to fit between and under the sloping rafters (including a lot of bloomin awkward shapes and angles...)
Normally I would use a conventional fine tooth saw for this type of job but for a relatively small outlay I thought it worth trying this - especially due to the promises of reducing the dust when cutting in a confined space which can be a nasty hazard.
Firstly - whilst the descriptions of 'new waved toothing' may make for a good sales pitch what this really means is 'it is a large kitchen knife blade with a serated edge'. Nothing worse for that, but hopefully it helps you know what you are getting!
After a bit (well, a lot) of trial and error I found that:
- This saw is brilliant at carefully cutting angled pieces in any thickness (including 45 degree cuts in 100mm thick board)
- The thinner the board you are using the more successful you are likely to be with long straight cuts. For the thicker boards I found the thin blade wanders far too much and I went back to a conventional saw and got much better results.
- You need to keep the blade sharp. I bought the Bahco original one with the saw, Bahco SHARPINS Insulation Saw Sharpener but this is just a standard knife sharpener in an expensive piece of plastic; save yourself a few pounds and just use a normal one.
- When the blade is sharp you can finely adjust your cuts by shaving the edges of the boards with much less dust than a normal saw blade generates.
- For final fitting of boards between rafters I found it easier to run a conventional saw down the edge. This makes for a lot of dust but on balance it made for a quicker and easier job.
Overall, this is a very useful additional tool if you have insulation work to do, but I would not suggest it as a complete replacement for a conventional fine blade saw